"All persons traveling through the park from October 1 to June 1 should be regarded with suspicion."
U.S. Army Rules, Regulations, and Instructions, 1907
I worked 5 winters at Old Faithful in the late 70's and early 80's before moving to Lake for a few winters. Somewhere in those Lake years I'm thinking the folks at Old Faithful got their Winter Olympics started. It's turned into a pretty great deal from what I hear.
A friend stumbled across a link to a website with some great photos by Scott Hanley.
Check it out